Sheet-metal pulley.



No. 635,9l2. Pafented Oct. 3|, I899.

0. A. BBINLEY. v SHEET METAL PULLEY.

(Apphcat on filed Feb 13 1899 (No Model.)

'NITEHFDV STATES PATENT Fries.

CHARLES A. BRINLEY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE AMERICAN PULLEY'COMPANY, OF PENNSYLVANIA.

SHEET-METAL PULLE Y.

SPECIFICATION forming part of Letters Patent No. 635,912, dated October 31, 1899.

Application filed February 13, 1899. Serial 705,87 (No mo l-i T01 all whom it may concern.-

Be it known that I, CHARLES A. BRINLEY, of Philadelphia, Pennsylvania, have invented an Improvement in Sheet-Metal Pulleys, of which the following is a specification.

My invention has reference to sheet-metal pulleys; and it consists of certain improvements which are fully set forth in the following specification and shown in the accompanying drawings, which form a part thereof.

In the manufacture of sheet-metal pulleys such, for example, as illustrated in the patent to Corscaden,.No. 595,559, dated December 14:, 1897it has been customary to form the rim of the pulley of four semicircular sections arranged in pairs and united to form a complete rim by suitable rim-clamps. The adjacent semicircular edges of the rims forming half of the pulley were inwardly flanged and riveted together, and the outer edges of said sections were curled over or beaded to impart strength and finish. While this has been found entirely satisfactory for pulleys of small sizes, it is expensive and not practicable when the pulleys are to be of large diameters.

The object of my invention is to provide a suitable construction for large sheet-metal struction I am enabled to build up a sheetmetal pulley to a very large size and avoid the necessity of the extra reinforcing constructions at the lateral and outer edges of the rim. Moreover, the pulley may be constructed as a split pulley by using bolts in uniting the transverse flanges on one diameter of the rim to correspond with the line of division of the hub portion.

the particular work to be performed, but the construction shown is that which has been commonly employed as being excellently adapted to the purpose.

My invention will be better understood by reference to the drawings, in which Figure 1 is a side elevation of the pulley embodying my improvements. Fig. 2 is a sectional elevation of same on line 2 2. Fig. 3 is a perspective view showing the juncture of the circumferential and transverse flanges of the rim. Fig. 4. is a perspective view of the transverse reinforcing-cap. Fig. 5 is a transverse section on line 5 5 of Fig. l, and Fig. 6 is a plan view of the sheet before being bentinto the form of a section.

' A is the rim of the pulley and is connected to the outer ends of the radial spoke-arms B, the inner ends of which are connected to the semicircular hub portions 1), riveted or otherwise secured to the semicircular hub-shells O. The hub portions 1) are further provided with suitable clamps D, through which clasping-bolts d pass, so that the two halves of the hub and spoke portions of the wheel may be united and clamped upon the shaft or split bushing in the well -known manner. As shown in Fig. 2, the spoke-arms and hub portions are arranged in pairs, so that the outer ends of each pair of spoke-arms receive between them the circumferential or annular inner flange of the rim, to which the spokearms are riveted at J.

The rim A consists of a series of sections E, each forming a portion of the whole circumference, preferably one-sixth thereof. These sections are arranged in pairs, their adjacent edges being provided with circumferential flanges G, adapted to be secured together to form an annular flange within the rim and located intermediate between the lateral edges, thus imparting the necessary rigidity against inward crushing. The outer edges of these sections may be left plain or without flanges, beads, or any other special construction, as is clearly shown in Fig. 2. It is evident, however, that the outer edges may be beaded, as in'the patent referred to, ifso desired. The ends of each of the sections in the direction of the circumference or curvature of the rim are inwardly flanged, as

at F, so that the adjacent flanges abut against each other. The sections of which the rim is built up are first formed of sheets, such as indicated in Fig. 6, with two of the ends notched out. This sheet is then bent on the line S, so that the part G shall constitute the annular flange, and the end parts F are bent on transverse lines T T to form the end flanges F in the rim. In perfecting these flanges the proper circumferential curvature is given to the sheet, and this curve is either the same at both inner and outer edges or slightly different, according as to whether the rim of the wheel is to be flat-faced or crowned. These flanges are firmly riveted or bolted together, and the joint is preferably further strengthened by reinforcing U-shaped caps H, which fit over the said flanges and through which and the flanges the rivets f pass. In this manner great lateral rigidity is secured for the outer edges of the rim. In the case of the juncture of the sections E on the line where the pulley is to be divided to form a split pulley bolts f are employed in place of rivets, so that the two sections of the wheel may readily be separated when desired, as in the case of split'pulleys.

It is evident that, if desired, the capping pieces H may be like fish-plates or omitted, and it is also evident that said cappingpieces need not extend across the circumferential or annular flange G, though I prefer that they shall cross said flange, as indicated, since it enables the capping-pieces to secure greater rigidity to the rim.

It will be seen that the rim is composed of two circular rings arranged end to end and bolted together through the annular flanges, and each ring is furthermore composed of a series of circumferential sections.

The minor details of construction may be modified without departing from the principles of myinvention, and the hub and spokes may be constructed in any suitable manner desired.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a pulley, the combination of suitable hub structure and spoke-arms, with a rim formed of sheet metal subdivided circumferentially and transversely at intervals the secformed of sheet metal subdivided circumferentially and transversely at intervals the sections so formed having inwardly-extending flanges riveted or bolted together, and trans verse reinforcing capping-pieces fitting over the transverse flanges and secured to them.

3. In a pulley, the combination of suitable hub structures and spoke-arms, with a rim formed of sheet metal subdivided circumferentially and transversely at intervals the sec tions so formed having inwardly-extending flanges riveted or bolted together, said circumferential flanges being slotted at their juncture with the transverse flanges and transverse reinforcing capping-pieces fitting over the transverse flanges and secured to them, and further extending through slotted portions of the circumferential flanges.

4. A pulley-rim composed of two circular rings arranged end to end and each having the adjacent edge formed with a circumferential or annular inwardly-extending flange G riveted or secured to the other, and in which each of the circular rings is further divided into segments less than a semicircle and also provided with inwardly-extending transverse flanges F at their ends which are riveted or bolted together.

5. A pulley-rim composed of two circular rings arranged end to end and each having the adjacent edge formed with a circumferential or annular inwardly-extending flange G riveted or secured to the other, and in which each of the circular rings is further divided into segments less than a semicircle and also provided with inwardly-extending transverse flanges F at their ends which are riveted or bolted together, a hub portion and spokes or arms of sheet metal having their outer ends lapping upon and riveted to the-circumferential or annular flange.

In testimony of which invention I have hereunto set my hand.

CHARLES A. BRINLEY.

Vtitnesses:

HENRY W. SCARBOROUGH, HENRY I-IUMPI-IREYS. 

